axmol/core/3d/CCRay.h

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 Copyright (c) 2014-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

 https://axis-project.github.io/

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#ifndef __CC_RAY_H_
#define __CC_RAY_H_

#include "math/CCMath.h"
#include "3d/CCAABB.h"
#include "3d/CCOBB.h"
#include "3d/CCPlane.h"

NS_CC_BEGIN

/**
 * @addtogroup _3d
 * @{
 */

/**
 * @brief Ray is a line with one end. usually use it to check intersects with some object,such as Plane, OBB, AABB
 * @js NA
 **/
class CC_DLL Ray
{
public:
    /**
     * Constructor.
     *
     * @lua new
     */
    Ray();

    /**
     * Constructor.
     * @lua NA
     */
    Ray(const Ray& ray);

    /**
     * Constructs a new ray initialized to the specified values.
     *
     * @param origin The ray's origin.
     * @param direction The ray's direction.
     * @lua new
     */
    Ray(const Vec3& origin, const Vec3& direction);

    /**
     * Destructor.
     * @lua NA
     */
    ~Ray();

    /**
     * Check whether this ray intersects with the specified AABB.
     */
    bool intersects(const AABB& aabb, float* distance = nullptr) const;

    /**
     * Check whether this ray intersects with the specified OBB.
     */
    bool intersects(const OBB& obb, float* distance = nullptr) const;

    float dist(const Plane& plane) const;
    Vec3 intersects(const Plane& plane) const;

    /**
     * Sets this ray to the specified values.
     *
     * @param origin The ray's origin.
     * @param direction The ray's direction.
     */
    void set(const Vec3& origin, const Vec3& direction);

    /**
     * Transforms this ray by the given transformation matrix.
     *
     * @param matrix The transformation matrix to transform by.
     */
    void transform(const Mat4& matrix);

    Vec3 _origin;     // The ray origin position.
    Vec3 _direction;  // The ray direction vector.
};

// end of 3d group
/// @}

NS_CC_END

#endif